☡

Misc Symbol 34

Unicode
U+2621
Category
Zodiac
HTML Entity
☡
CSS
\2621
The ☡ (Caution Sign) symbol, famously known as the "dangerous bend" symbol, was introduced by the Nicolas Bourbaki group of mathematicians in the mid-20th century. Visually resembling a zigzagging road sign, it is used in textbooks to warn readers about tricky passages, common errors, or particularly difficult concepts. Today, it remains a charming typographical quirk in academic literature and technical documentation to flag areas where readers should proceed with care.

How to Type

Windows
Type 2621 then press Alt + X
macOS
Control + Command + Space then search "caution sign"
Linux
Ctrl + Shift + U then 2621
HTML
☡

In Programming

In LaTeX, this symbol is often rendered using the `manfnt` package (as `\dbend` or `\danger`) to flag mathematically complex or easily misunderstood sections in technical documentation.

Read full meaning article

Tags

Bourbaki dangerous bend academic typography bourbaki caution danger dangerous bend hazard math warning mathematical symbol skull crossbones textbook symbol tricky passage warning zigzag sign

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